I have a Macbook Air (Mid-2011) at home and a Verizon Actiontec MI424WR Rev. I router. Recently, I noticed that the internet got slower for about 10 sec. and went back to normal. I then opened Wifi Explorer to monitor the signal strength, and sure enough, I see a drop in the strength. Also, sometimes when waking from sleep, the wifi icon indicates that it is searching for my network. I have to turn wifi off then on to let it reconnect. This problem has appeared on Mavericks and Mountain Lion after I downgraded.
UPDATE 01/25/2014 I installed Windows 7 using Boot Camp. Strangely, it does not exhibit this problem.This leads me to believe that it is a Mac OS X problem. Anyone have any ideas?
UPDATE 02/14/2014 I retract my earlier statement. It does exhibit this problem.